/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 34255
 * Date: 2024-05-23
 * Time: 13:37
 */
final class IA{//父类
    int a = 1;
    int b = 2;
}
class IB extends IA{//子类
    int c = 3;
    int d = 4;
}
public class Test1 {
    public static void main(String[] args) {

    }
}
